Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
GC COLUMNS | APPLICATION-SPECIFIC COLUMNS<br />
Petroleum & Petrochemical<br />
Aromatics & Oxygenates in Gasoline Analysis<br />
Rt®-TCEP Columns (fused silica)<br />
(highly polar phase; 1,2,3-tris[2-cyanoethoxy]propane—not bonded)<br />
• General purpose <strong>columns</strong>, ideal for aromatics and oxygenates in gasoline.<br />
• Temperature range: 0 °C to 135 °C.<br />
Most gasolines contain aliphatic hydrocarbons up to n-dodecane (C12). To improve<br />
identification of the aromatics and oxygenates, it is desirable to elute benzene after C11<br />
and toluene after C12. The extremely polar Rt®-TCEP stationary phase provides a<br />
retention index for benzene greater than 1100 and permits the separation of alcohols<br />
and aromatics from the aliphatic constituents in gasoline.<br />
Rt®-TCEP <strong>columns</strong> have the same high polarity as TCEP packed <strong>columns</strong> (pre<strong>columns</strong><br />
in ASTM Method D4815 for the analysis of petroleum oxygenates), with the efficiency<br />
of a capillary column. The result is a column that can separate a wide variety of compounds<br />
with an elution pattern unattainable using other high polarity siloxanes.<br />
similar phases<br />
SPB-TCEP, CP-TCEP<br />
The Rt®-TCEP column incorporates a nonbonded stationary phase coated on a surface<br />
specialized for enhanced polymer stability and extended column lifetime. Solvent rinsing<br />
should be avoided. Conditioning is necessary only if the column is to be used at<br />
temperatures near the maximum operating temperature.<br />
ID df temp. limits 30-Meter 60-Meter<br />
0.25mm 0.40µm 0 to 135°C 10998 10999<br />
Petroleum oxygenates on an Rt®-TCEP column.<br />
1<br />
2<br />
1. methyl tert-butyl ether<br />
2. n-undecane<br />
3. tert-butanol<br />
4. methanol<br />
5. isopropyl alcohol<br />
6. ethanol<br />
7. n-dodecane<br />
8. n-tridecane<br />
9. n-butanol<br />
3<br />
5 6 7<br />
8<br />
9<br />
4<br />
min. 2 4 6 8 10 12 14 16<br />
GC_PC00195<br />
Column: Rt ® -TCEP, 60m, 0.25mm ID, 0.4µm (cat.# 10999)<br />
Inj.:<br />
1.0µL split injection, components @ 500ppm.<br />
Oven temp.: 60°C (hold 5 min.) to 100°C @ 5°C/min. (hold 10 min.)<br />
Inj./det. temp.: 200°C<br />
Carrier gas: helium<br />
Linear velocity: 30cm/sec. set @ 80°C<br />
FID sensitivity: 6.4 x 10 -11 AFS<br />
Split flow: 46mL/min.<br />
Solutions For Your Petroleum & Petrochemical Analyses<br />
Improved best-in-class GC <strong>columns</strong> • Standards • Industry experts at your service.<br />
Visit us at www.restek.com/petro<br />
80 www.restek.com<br />
Website : www.chromtech.net.au E-mail : info@chromtech.net.au TelNo : 03 9762 2034 . . . in AUSTRALIA Mar 2011
Change language